<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Vue 记事本</title>
    <link rel="stylesheet" type="text/css" href="css/index.css">
</head>
<body>
    <!--主体区域-->
    <section id="todoapp">
        <!--输入框-->
        <header class="header">
            <h1>Vue 记事本</h1>
            <input v-model="inputValue" @keyup.enter="add" autofocus="autofocus" autocomplete="off"
            placeholder="请输入任务" class="new-todo"/>
        </header>
        <!--列表区域-->
        <section class="main">
            <ul class="todo-list">
                <li class="todo" v-for="(item,index) in list">
                    <div class="view">
                        <span class="index">{{ index+1 }}.</span>
                        <label>{{ item }}</label>
                        <button class="destroy" @click="remove(index)"></button>
                    </div>
                </li>
            </ul>
        </section>
        <!--统计与清空-->
        <footer class="footer">
            <span class="todo-count" v-show="list.length!=0"><strong>{{ list.length }}</strong>items left</span>
            <button class="clear-completed" v-show="list.length!=0" @click ="clear">Clear</button>
        </footer>
    </section>
    <!--底部-->
    <footer class="info">

    </footer>

    
</body>
</html>
<script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>

    <script>

        var app = new Vue({
            el:"#todoapp",
            data:{
               list:["写代码","吃饭饭","睡觉觉"],
               inputValue:"好好学习，天天向上"
            },
            methods: {
                add:function(){
                    this.list.push(this.inputValue);
                },
                remove:function(index){
                    console.log("删除");
                    console.log(index);
                    this.list.splice(index,1);
                },
                clear:function(){
                    this.list = [];
                }
            },
        })
    </script>